(7k-3)(k+4)=0

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Solution for (7k-3)(k+4)=0 equation:


Simplifying
(7k + -3)(k + 4) = 0

Reorder the terms:
(-3 + 7k)(k + 4) = 0

Reorder the terms:
(-3 + 7k)(4 + k) = 0

Multiply (-3 + 7k) * (4 + k)
(-3(4 + k) + 7k * (4 + k)) = 0
((4 * -3 + k * -3) + 7k * (4 + k)) = 0
((-12 + -3k) + 7k * (4 + k)) = 0
(-12 + -3k + (4 * 7k + k * 7k)) = 0
(-12 + -3k + (28k + 7k2)) = 0

Combine like terms: -3k + 28k = 25k
(-12 + 25k + 7k2) = 0

Solving
-12 + 25k + 7k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(-4 + -1k)(3 + -7k) = 0

Subproblem 1

Set the factor '(-4 + -1k)' equal to zero and attempt to solve: Simplifying -4 + -1k = 0 Solving -4 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1k = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1k = 0 + 4 -1k = 0 + 4 Combine like terms: 0 + 4 = 4 -1k = 4 Divide each side by '-1'. k = -4 Simplifying k = -4

Subproblem 2

Set the factor '(3 + -7k)' equal to zero and attempt to solve: Simplifying 3 + -7k = 0 Solving 3 + -7k = 0 Move all terms containing k to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -7k = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -7k = 0 + -3 -7k = 0 + -3 Combine like terms: 0 + -3 = -3 -7k = -3 Divide each side by '-7'. k = 0.4285714286 Simplifying k = 0.4285714286

Solution

k = {-4, 0.4285714286}

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